Self-cleaning nozzle



Patented Mar. 10, 192.5.

` RUDOLF HrNfcaf ornssnlv, GERMANY.

sELF-oLriANNG NozzLE.

' Appication med Augustai; 1921. serial No. 494,888.

To' all whom t may concern:

Be it known that I, RUDoLFIIINma citi-V zen'V of Germany, residing atEssenVGe-rmany, have invented 'certain'new and useful Improvements in Self-Cleaning Nozzles for which I have filed applications inGrer-r many, June 17,1919; Belgium, March '8, 1921; Holland, March 30, 1921; France, March 8, 1921;fCzechoslovakia, March 30, 1921; England, January 10, 1921), of Which the following is a specification.

My invention relates to nozzles and in particular to spray nozzlesoperated by compressed air, Water under pressure steam or some other medium. These nozzles have the drawback that their discharge openings easily become clogged by foreign substances in the operating medium. This drawback is particularly obnoxious Where spray nozzles are used for the ventilation of mines. If the nozzles are clogged, they are usually cleaned by unauthorized persons so that their openings become too Wide and consequently the consumption of compressed air or the like will become too high.

According to my invention, the nozzle is so constructed that it cannot become clogged. It is provided with a bead shaped head at the end of the nozzle behind which fine perforations or slots are provided lin the body of the nozzle. The pressure medium, such as compressed air, can get into the passage of the nozzle While the foreign sub stances contained in it are diverted side- Ways by the beaded head of the nozzle. Preferably, the perforated portion of the nozzle is made conical,

The novel nozzle can be operated continuously and has good eiciency. In order to provide, in the ventilation of mines, an energetic motion of the air in the passages, preferably a funnel shaped diffuser is provided in front of the nozzle in the central opening of Which there is an adjustable ring. Experience shows that by means of this diffusera more energetic flow of the medium is effected than by the arrangement of the nozzle hereto-fore used.

In the drawing affixed to this specification and forming part thereof, a device embodying my invention is illustrated diagrammat- 'ically by Way of example. In the drawings- `Fig. 1 is an elevation, partly in longitudinal section, of a Ventilating device according to the present invention,

Fig. .2 isa section through `the nozzle proper, I Figs. 3 and 4 are elevations of the nozzle showingk different kinds of openings,

Fig. 5 is an end elevation, i Fig. 6 is an elevation of a nozzle forthe ventilation of mines` partly in section arranged inposition in the VentilatingA pipe, a is the pipe or casing and o is a nozzle tube inserted in an axial opening thereof and having an axial passage f. A frusto'- conical portion 0 of the nozzle tube b ex tends freely in rearward direction into the pipe or casing a Its narrow inner end carries a protective head With Walls diverging in the direction of iiovv of the medium supplied to the nozzle. The frusto-conical portion c is provided with a number of slots or perforations e which extend from its surface to passage f. The slots, which may be formed by sawing, may be in any desired position. They may be at an angle to the axis of the insertion, as illustrated in Fig. 2, they may extend in planes extending through the axis, as illustrated in Fig. 3, or they may be at right angles to it, as illustrated in Fig. 4. The slots may intersect each other. Instead of slots, fine perforations maybe provided which may also intersect. These slots or perforations are always open to conduct the medium under pressure into the insertion if the opening of passage ,f is clogged. The i foreign substances drawn into tube 71 l(Fig. 1) will be thrown to one side by the head d While the medium under pressure enters the passage f through slots e. The foreign substances will collect'in the casing of the nozzle and are removed from time to time by means of a pipe g provided with a cock h.' For example, they i j 1,529,590 UNITED -S"I-.1\.fv'r1:sL PATENT OFFICE may be blovvn out by means of the pressure medium.

In the device illustrated in Fig. 6, a diffuser m is provided in front of the nozzle b in the opening of which is an adjustable ring o. This provides a considerably better current of air in the air passage p. The ring o can vbe adjusted axially in order to more or less concentrate the stream of compressed air which is discharged by the nozzles a.

The ring o is so adjusted that the most tion apipe or casing adapted to be supplied with a inediuln under pressure, a nozzle tube Y disposed in an axial opening of said pipe or casing7 a rusto conical portion of said nozzle tube extending freely rearwards into said pipe or casing and being provided with narrow apertures extending into the interior of said nozzle tube and a protective head with conically diverging walls at the inner narrow end of said tapering` portion.

2. Spray nozzle comprising in cornbination, a pipe or casing adapted to be supplied witli a medium under pressure, a nozzle tube disposed in an axial opening of said pipe or casing, a frusto-conical portion of said nozzle tube extending freely rearwards into said pipe or casing and Vbeing provided with narrow apertures extending into the interior of said nozzle tube, a. protective head with conically diverging walls at the inner narrow end and a diffuser in front of said nozzle tube.

3. Spray nozzle comprising in combination, a pipe or casing adapted to be supplied wit-h a niediurn under pressure, a nozzle tube disposed in an axial opening of said pipe or casing, a frusto conical portion of Said nozzle tube extending freely rear wards into said pipe or casing and being provided with narrow apertures extending into the interior of said nozzle tube, a protective head with conically diverging walls at the inner narrow end, a diiiuser in front of said nozzle tube and a mouth-piece ad- I justably disposed in said diffuser.

In testimony whereof I alix lny signature.

RUDOLF HING. 

